A respiratory system comprises a dual outlet blower. One of a first and a second outlet of the blower provides a flow of gases to one of a pair of nasal outlets of a nasal interface and the other one of the first and second outlets provides a flow of gases to the other one of the pair of nasal outlets of the nasal interface. In an alternative embodiment, one of the first and second outlets provides a flow of gases to a nasal outlet of an oro-nasal interface and the other one of the first and second outlets provides a flow of gases to an oral outlet of the oro-nasal interface.
